This chemical reaction is very dangerous.

Thermochemistry is a part of chemistry that deals with the reactions of heat and matter.

Chemotransmitters play an important role in the transmission of information between nerve cells.

He added sugar to his coffee.

He is an excellent pianist, besides, he is also an excellent composer.

This chemical reaction is very dangerous.

This chemical reacts when heat is added.

He is majoring in chemistry at university.

What is this material made of?

He missed school because he had a fever.